One Single Static Measurement Predicts Wave Localization in Complex Structures.
One Single Static Measurement Predicts Wave Localization in Complex Structures.
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DOI：
10.1103/physrevlett.117.074301
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发表时间：
2016-04
影响因子：
8.6
通讯作者：
G. Lefebvre;Alexane Gondel;M. Dubois;M. Atlan;F. Feppon;A. Labbé;C. Gillot;Alix Garelli;M. Ernoult;S. Mayboroda;M. Filoche;P. Sebbah
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文献类型：
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作者：
G. Lefebvre;Alexane Gondel;M. Dubois;M. Atlan;F. Feppon;A. Labbé;C. Gillot;Alix Garelli;M. Ernoult;S. Mayboroda;M. Filoche;P. Sebbah
最近的理论突破带来了一个新的工具，称为本地化景观，用于预测复杂或无序系统中振动模式的本地化区域。在这里，我们报告的第一个实验，测量本地化景观，并证明其预测能力。利用全息技术测量具有复杂几何形状的薄板在均布载荷作用下的静态变形，可以直接获得横向函数。当投入振动时，该系统显示出精确地限制在由景观功能划定的子区域内的模式。此外，该函数的最大值与测量的本征频率相匹配，而谷网络的最小值给出了模式扩展的频率。这种方法可以从一次静态测量中完全表征复杂结构的低频频谱。它为任何振动系统中的控制和工程特征模式铺平了道路，特别是在结构或微观描述无法访问的情况下。
A recent theoretical breakthrough has brought a new tool, called the localization landscape, for predicting the localization regions of vibration modes in complex or disordered systems. Here, we report on the first experiment which measures the localization landscape and demonstrates its predictive power. Holographic measurement of the static deformation under uniform load of a thin plate with complex geometry provides direct access to the landscape function. When put in vibration, this system shows modes precisely confined within the subregions delineated by the landscape function. Also the maxima of this function match the measured eigenfrequencies, while the minima of the valley network gives the frequencies at which modes become extended. This approach fully characterizes the low frequency spectrum of a complex structure from a single static measurement. It paves the way for controlling and engineering eigenmodes in any vibratory system, especially where a structural or microscopic description is not accessible.